Smartphone manufacturers have found plenty of ways to scratch our itch for sleek, thin smartphones; just look at models like the HTC One, which uses an arched back to keep the handset feeling thin along its edges, while being bulky enough where it counts to keep the phone feeling rigid and provide enough space for all its internal components. Still, for as useful as these sorts of “cheats” can be, there’s still something alluring about a phone that’s just straight-up thin. Lately, manufacturers vying for the title of thinnest around have been clashing in the six-to-seven millimeter space. We might soon be inching down into five-millimeter territory, if the trajectory suggested by rumors of an upcoming 6.13 mm Android from Oppo continues.

Previously, Alcatel held the thinnest crown, making headlines with its 6.45 mm One Touch Idol Ultra at CES 2013. We wondered if Huawei might swoop in to one-up Alcatel, but so far it hasn’t come through. If these rumors of this new Oppo model are accurate, the bar has been seriously raised (or lowered, as the case may be).

Oppo model R809T is believed to measure 6.13 mm thick, have a 4.5-inch 720p display, include 1GB of RAM, and run a quad-core MediaTek SoC. It could cost around $400 when released, but very well might end up staying put in China.

If this info is accurate, we should get our confirmation quite soon, as the R809T is rumored to launch on April 26.